A list of UK friendly stores for electronic components and Arduino related stuff.
bitsbox.co.uk – Very cheap!
rapidonline.com
uk.farnell.com
seeedstudio.com – Hong-Kong / Cheap Product / Cheap WW Delivery
chemicaloliver.net/arduino – A big list of UK distributors.
HobbyTronics – £2 delivery / Free on orders over £50
futurlec.com
Earthshine Electronics – Min £1.75 Delivery
Mouser.com – £12 delivery on £0-£50 (free on orders £50+)
RobotBits.co.uk
Maplin
Cool Components – Expensive Delivery, but wide variety
Oomlout
Watterott – 10€ (about £8.59) on 0kg – 3kg orders
Active-Robots.com
RoboSavvy.com
SKPang.co.ukProto-Pic.co.uk
TechnoBotsOnline.com
Other useful suppliers